Jack strap and stirrup



July 13, 1948.

F. A. HAMILTON JACK STRAP AND STIRRUP 2 Sheets-Sheet 1 Filed May 15,1946 I .1 if 7 Fred A. Ham/lion July 13, 1948.

F. A. HAMILTON JACK STRAP AND STIRRUP 2 Sheets-Sheet 2 Filed may 15,1946 Patented July 13, 1948 Hamilton, Easley, S; 0., assignor-oflonehalf .toJerrylf. Lesley Easley, ,S.. C.

" Application' May 15, 1946, S erial No. 669,887

This invention relates to for connecting the treadles ofla loom to thejack strap, which is associated with the lower portions.

of'the'harness' frames. a Y I Heretofore, the stirrups disposed: on thetreadles I have extended upwardly a substantial distance. and havesecured thereto, by means of a bolt and; thumb nut, the two ends of aleatherstrap, which extends upwardly andpassesthrough a. slot in: thejackstick. As is well known, the treadles of the loommove part of theharness frames: downwardly and cause-other frames tomove uD-wardlytoiorm a shed in the warp It very often,

happens that the jack stick, when iniowered position, willengage thethumb nut on the stirrup associated with thejack strap connected-to theharness 'frame, which is in raised; position. This causes-a notchtobecut from the lower edge of the jack stick, and this notch soon deepensto the point where the jack stick is weakenedto the point where itmust-bereplaced.

In, the type of strap and,.stirrupsheretofore, used, there has been a'stirrup similar to the one shown in the drawingsexcept that. the.transverse portionv at the top was not ofisetand aroundlthis transverseportion was idOllblBd-yOHQ. endoflthestrap, and above the transverseportion, there were two coinciding holesin the strap,

through which a bolt was placed, and thisholt penetrated the slot. in.the free end of .thestrap', andasuitable plate on theboltwas.coizifineqv by'a thumbnut, lihis placed the thumbnut at;

a, very much greater distance above the. treadle than, inthe presentstyle of stirrup. The old type-allowed stretching of thestralp betweenthe stirrup ahdjthe. bolt, and would allow what .is'f

called riding rip resultingjin thenut .on the bolt strikingthe jackstick and [breaking or the 1 jack strap, andfcuttinga large gapin thelow r;

With the present type of stirrup, the jack" edge of the jack stick.straps :wearmuch longer. Practically all jack straps wear out where theyloop around the old type stirrup, and very little Wear-occurs where thestrap goes through the slot .in the jack stick.

By clamping the jack strap at the stirrup, as in,

the presentinvention, all wear at the connection point between the topof the stirrup and the jack strap is eliminated.

The present invention also eiiminates swing ing, andwearing of thestirrupv on the :treadle by beingwheld in a straight line by the,rstifiii ess of the jack strap. Another important feature of theinvention is that these jack straps are usually made of a good qualityof leather, and the presan improved stirrup 1 4 Claims. (Cl. ita -483icut inventionsaves approximately four inches of leather on each jackstrap.

It :isanobjectpf this invention to provide a stirrup .of'much shorterlength than has heretofore beenlused, and having atransverseportiondisposed at .a'much lower point than has heretofore been thecustom, and this transverse por--.

tion is provided with a :Pbolt and a thumb nut, so that the :two ends ofthe jack strap can beadjus-ted, one of the ends having a suitable slottherein, and thus .the bolt with .lthe 'ithumb nu't thereon is loweredto a point-sufliciently close to the 'treadles to prevent it beingengaged. by a lowered jack stick, when its associated jack stick andharness irame is incraised position.

Another important advantage of the presentinvention is'that in th oldtype of "connection, there :was'a stirrup and a separate clam disposedabovethe stirrup. ='In the present invention, the

stirrup and clamp are combined, so it is a'combination stirrupand clamp,thus lowering' the position of theclamp substantially and thus causingthe boltand nut associated with the clamp to lie-down close enough tothe tread'le' so that the bolt will not engage a lowered jack' stick.

Some of the objects of the invention'having been stated, other objectswill appear as the de-' scription proceeds, when taken in connectionwith the accompanying drawings, in which:

Figure 1 is an elevation of a portionof a loom and showing two harnessfran es, one in elevated and one inlowered 'pos'itionf Figure '2 isenlarged detail and showing v in elevation thel stirr'up and itsassociated strap; Figure 1s avertical sectional view taken along theline 3 3 in Figure 2; I Figure 4 is a vertical sectional view takenalong theline l fl in Figure 1; v,

Figurebis an elevation of the stirrupv disassociated from the strap andthe bolt and square washer normally associated therewith; ,7 fFigurefiis elevation of one of the straps associated withthes'tirrups and withthe jack sticks.

. Referring hecldle having an .eye,;.s uch as 45 and .l 6, therein andthe 'llQIEIYEXld of harness frame ill. is supported by suitable strapsi8 and L3 secured to and adapted to he Wound around suitable rollers 20and .21, disposed .on an oscillatable shaft which is suitably mounted inthe 100m frame by means, not shown, and suitably connected to therriorfl e specificall .to the drawin s; the numerals l0 and 11 indicatea pair of harness. frame-s having heddles 1'2 and I 3 therein, each.

treadle operating means, to be described, to synchronize and operatetherewith.

The harness frame II is supported by suitable straps 24 and 25, whichare likewise secured to and adapted to be wound around suitable members26 and 21 secured on the shaft 22.

The lower end of harness frame III has suitable U members 30 and 3|secured thereto, towhich jack hooks 32 and 33 are connected,w'hich inturn are mounted in eye bolts 34 and 35 secured in a jack stick 36.

The harness frame ll likewise has suitable U members secured near eachend thereof rin the I same manner as U members 30 and 3|, to which hooks4| and 42 are secured, which'arejadapted to hook in eye bolts. 43 and 44secured in 'a'iack' stick45. U

The jack sticks 36 and 45 have holes 46 and 41 respectively thereinthrough which passes a strap member, such as leather straps 48. Thesestrap members 48 at their lower-ends hav'eia suitable hole 49 therein,which is penetrated by a bolt 50 mounted in a hole "46 in a transverseportion 5| of a stirrup. 52, which has'a lower transverse portion 53which is adapted to hook in one of the notches 54 in one of the stirruplevers 55. The other end of the strap member 48 has an elongated slot55, and after the strap member 48 passes through one of the slots or 41,it is dropped down and passed over the bolt 50 and a rectangular washer51 is placed againstthe same, and then a thumb nut 58 is driven home onthe bolt 50 to clamp the free end of the strap 48 in position to thusregulate the overall length of the strap 48 between the bolt '50 thetreadles, which are disposed low enough so as not to be engaged bythejack stick, as the harness frame moves one to uppermost position andone to lowermost position.

In the drawings and specification,.there has,

been set forth a preferred embodiment of the invention, and althoughspecificterms have been employed, they are used in a generic anddescripa tive sense only, and not for purposes of limitation, the scopeof the invention being defined in the claims.

I claim: V 1. A stirrup for connecting the treadles, of a loom with the.jack stick comprising a member having a U-shaped portion whose lower.end is adapted to fit into one of the notchesinthe lower secured on saidbolt for forcing said washer against the free end of said strap forclamping the same in adjusted position.

2. In a loom having harness frames and treadles for raising and loweringthe harness frames, each harness frame having secured to its lower edgea jack stick, each jack stick having a slot therethrough, a jackstrapadapted to bepassed through the slot and. having its two endsextending'downwardly, one of the ends of said strap having a holetherethrough, a stirrup member having a lower transverse portion adaptedto hook beneath a treadle and having an upper transverse portionpenetrated by a bolt, said bolt being adapted to penetrate the hole inone end of said jack strap, the other end of said jack strap having anelongatedslot therein adapted to fit over said bolt, and a washer onsaid bolt and a nut surface of the treadles of the loom, and having itsupper end closed by a transverse portionand provided with a hole, a boltmounted in said hole, a jack strap having a. hole in one end thereofpenetrated by said bolt, said jack strap. having an elongated slot inits other end, the jack strap being adapted to be passed through asuitable slot in the jack stick and to have its free end penetrated bysaid bolt, a washer adapted to fit around said bolt and against thefreeoend of said jack strap, and a thumb nut threadabl'y end of the jackstrap and holding it in adjusted position. I 1

3. In a loom having harness framesjan'd trea dles for raising andlowering the hamess'frame's," each harness frame having secured toitslower edge a jack stick, each jack'stick having a'slot therethrough, ajack strap adapted to be passed through the slot and having its two endsextend ing downwardly, one of theends of said strap having a holetherethrough, a stirrup member having a lower transverse portion adaptedto hook" beneath a treadle and having an upper transverse portionpenetrated by a bolt, said bolt being adapted to penetrate the hole inone end of said jack strap, the otherend of said jack strap having anelongated slottherein adapted to fit over said bolt, a washer on saidbolt'and a'nut on said bolt for clampinglyengaging the free end of thejack strap and holding it in adjusted posi tion, the position of saidbolt being low enough so that the nut thereon will not be engaged'by.

a lowered jack stick, whenthe nut is moved to of the other harnessraised position by the raising frame.

4. In a loom having Jack sticks, treadles, and

jack straps, a stirrup connecting the treadles' to the jack sticks ofthe loom, said stirrupv having a transverse lower portionadapted to fitagainst.

the lower surface of the treadles, said stirrup projecting upwardly andoutwardly on each side of a treadle and having a transverse portion, the

transverse portion being provided with a hole and bolt mounted in saidhole and penetrating the ends of the jack strap after the jack strap hasbeen passed through a suitable slot in thejaczk stick, one end of thejack strap having an elongated slot extendinglongitudinally, ofthe iack,strap and through which the bolt passes, and a nut on said bolt forclampingly engaging the two ends of the jack strap and holding-itjn.adjusted position.

REFERENCES CITED The following references are of record file of thispatent: I 1 UNITED STATES PATENTS:

FREDA HAM LT -iii "para 5"

